Took a drug last night and no idea what is was?

Ok, last night i got told i was taking an anti depressant, my friend (who deals) gave me this because i didnt wanna take ecstacy, just have some of the same feelings (really happy). But today i woke up and im having really weird feelings, my pupils cover almost all my iris and i threw up twice. And i overall just feel twacked. is this normal for an anti depressant? he told me what i took was equal to four though, did i od? it did look like any normal anti depressant though, i googled some images. any idea of what couldve happened to me?